His conclusion is correct.
Lysosomes are cell organelles which contain hydrolytic enzymes. These enzymes are capable of breaking down biomolecules, such as proteins, lipids, carbohydrates, nucleic acid. In Prokaryotes there are no organelles, so Ranjeet’s cells must be derived from some Eukaryotes.
Among Eukaryotes only the animal cells contain lysosomes. In all other eukaryotic groups it is missing